The Order Book

The order book is one of the key features of a limit order exchange, it shows you what orders exist on AlphaDex.

Because AlphaDex provides the back-end DEX functionality for many front-end exchanges (like ShardSpace) the order book you see shows all the orders existing on AlphaDex and not just those submitted on ShardSpace. When you place either a buy order (in green) below the market 'Price' or a sell order (in red) above the market 'Price' it will get added to the order book. If you submit a buy order above the market price or sell order below the market price these are normally executed asap and are usually not added to the order book. Liquidity depending.